but the more law enforcement and prosecutor hun chun investigated, it seemed like a lost cause. >> so the most you've done is help prove your defendant's alibi. >> right. and hopefully help the alibi that he didn't do this. >> it put miguel kuros about 80 miles away from the night of the shooting. then, like a scene from "columbo" came the latest twist, something prosecutors saw during a court hearing. >> first of all, miguel kuros is left-handed. the shooter was described by the victim and his mother as right-handed. that's a little odd. >> odd because what left-handed person would try to commit murder with a gun in his right hand? >> it sounds like out of a movie. >> it's out of a movie, right. a scriptwriter might do something like that, but in real life it didn't make any sense. >> but then prosecutor chun saw this photo taken at a party, a barbecue. >> in this photo you have garrett warren, and he is facing miguel kuros and they are kneeling down. their children are in front of them. we can tell from the scar on garrett warren's face under his left ear that this is post shooting.